Any of the subatomic particles that compose matter and energy, especially one hypothesized or regarded as an irreducible constituent of matter. Also called fundamental particle See table at subatomic particle基本粒子:任何组成物质和能量的次原子质点,特别是被假设或被认为是物质的不可再缩小的组成部分的 也作 fundamental particle 参见 subatomic particle